linux-kernel - [PATCH 2/5] PCI: mvebu: Replace pci_ioremap_io() usage by devm_pci_remap

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Date:   Wed, 24 Nov 2021 16:41:13 +0100
From:   Pali Rohár <pali@...nel.org>
To:     Russell King <linux@...linux.org.uk>, Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Marek Behún <kabel@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/5] PCI: mvebu: Replace pci_ioremap_io() usage by devm_pci_remap_iospace()

Now when ARM architecture code also provides standard PCI core function
pci_remap_iospace(), use its devm_pci_remap_iospace() variant in
pci-mvebu.c driver instead of old ARM-specific pci_ioremap_io() function.

Call devm_pci_remap_iospace() before adding IO resource to host bridge
structure, at the place where it should be.

Signed-off-by: Pali Rohár <pali@...nel.org>
---
 drivers/pci/controller/pci-mvebu.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c
index ed13e81cd691..a55b8bd5eb62 100644
--- a/drivers/pci/controller/pci-mvebu.c
+++ b/drivers/pci/controller/pci-mvebu.c
@@ -992,6 +992,10 @@ static int mvebu_pcie_parse_request_resources(struct mvebu_pcie *pcie)
 					 resource_size(&pcie->io) - 1);
 		pcie->realio.name = "PCI I/O";
 
+		ret = devm_pci_remap_iospace(dev, &pcie->realio, pcie->io.start);
+		if (ret)
+			return ret;
+
 		pci_add_resource(&bridge->windows, &pcie->realio);
 		ret = devm_request_resource(dev, &ioport_resource, &pcie->realio);
 		if (ret)
@@ -1010,7 +1014,6 @@ static int mvebu_pcie_parse_request_resources(struct mvebu_pcie *pcie)
  */
 static int mvebu_pci_host_probe(struct pci_host_bridge *bridge)
 {
-	struct mvebu_pcie *pcie;
 	struct pci_bus *bus, *child;
 	int ret;
 
@@ -1020,14 +1023,6 @@ static int mvebu_pci_host_probe(struct pci_host_bridge *bridge)
 		return ret;
 	}
 
-	pcie = pci_host_bridge_priv(bridge);
-	if (resource_size(&pcie->io) != 0) {
-		unsigned int i;
-
-		for (i = 0; i < resource_size(&pcie->realio); i += SZ_64K)
-			pci_ioremap_io(i, pcie->io.start + i);
-	}
-
 	bus = bridge->bus;
 
 	/*
-- 
2.20.1